Power-press.



33. W. ZEH.

POWER PRESS.

APPLICATION FILED JUNE 1, 1912, l mfiflfifisfi Patented 0ct.28,1913.

2 SHEETS-SHEET 1.

m I, INVENTOI? M 6 g, W W

QMMQQ M B. W. ZBH.

POWER PRESS APPLICATION FILED JUNE 1, 1912.

m'mwzga Patente 060.28, 1913. 2 SHEETSSHEET 2;. 4% M fi' W 14q i the hammer up; Fig. 2 is a front view 01 a UNlTED STATES EiDfiMULNiD W. ZEH, 33F IQ'EWAIRLK, NEhV newnnranss.

Specificaition of Letters Patent. Application filed June 1, 1912. Serial No.

M nnesotans an i are. 700,908.

and llig. a is a detail section oi the sliding; head or hannner illustrating the use of a certain lengthening socket.

In the specific embodiment of the invention illustrated in said drawings, 1. indicates the frame of my improved press opt erahly mounted upon legs 2, 2 th elevlite to a suiiahli and convenient height. fE-iaid liranie 1 is centrally open, providing a vertical sliden'ay for a head or haniiner 3 car-- ried upon the lower end of a. screw l which of sairfl frame 1 and works tl'irough the top at its upper end ahoi'e the same a hori- To all whom 2'! may concern:

Be it known that I, EDMUND W. Znln'a" citizen of the United States residing at Newark, in the county of Essex and State of New Jersey, have invented certain improvements in P0wer-Presses, of which the following is a specification. f

This mvention relates to that class 01 power presses in which i. head for carrying the upper die is moved i p and down by a screw and means for oppositely rotating said screw.

The objects of the invention are to secure has improved tripping means by which the mazcntal wheel 5 providing at its pe phcry a chine may be operated; to particularly proliI'lGtlO'll sur'lace. 'lhc said hammer is vide means for eilecting such tripping by the operators foot; to enable the tri 'iping mechanism to automatically operate to prc rent a second blow of the hammer unless the operator manually depresses the treadle again, or on the other hand to cause continuous operation of the machine when so desired; to provide means for quickly changing from such continuous operation to single blows so that the hammer will become staa horizontal shall 'i' extends dian'iet-rically tionar 1 at the end oi its u )stroketo 013- ct said wheel. and is oin'aaled in hracke S, 9 bolted. to and projecting;- upward from the frame 1 at opposite sides of the machine. This shaft is provided at one end outside the bracket 8 with fast anti (loose pulleys l0 and 11 adapted to receive a driving belt (not shown) and which holt can he moved from one pulley or the other by the belt shifter l3etaveen its ltiearings in the brackets 8, 9, said shaft. 7 has fast upon itself driving disks 13 and laiadapted to alternately engage at their inner l: i115; sides dialnetrii'tally opposite portions oi the frictional lll'll of the horizontal wheel tain improved means for automatically stopping the hammer at the end ofits upstroke without undue oscillation; to make said means readily adjustable; to provide means for varying the force of impact for diiierent kinds of work without; changing the speed of the drive shaft; to secure siinplicity of construction and operation, and to obtain other advantages and results as may be brought out in the following dc scription.

Referring to the accompanying drawings, in which like numerals of. reference indicate the same parts throughout the several iig- Qbviously, as one or the other of the said ures, Figure 1 IS a perspective view of my drive disks 13, 14 is,.,-engaged with the fricimproved power press in idle position with iron wheel 5, said friction wheel will be rotated in one direction or the other, and the screw 4; lowered or raised. "Lilo effect such alternate engagement of the drive lShTS 13, 1-1 with the friction wheel 5, the shaft 7 is slid longitudinally in its hearings in the brackets 8, 9 by the means next to be described.

U 011 the end oil'the shaft- 7 outside of the brachet 9 are t me collars-15, 15 made fast by set screws or the like, and between said collars is a sleeve 16 rotatably loose upon the s raft and having trunnions 1? received by the forkedend ,18 oil-a lever 19 which is portion of the press with a certain tripping rod broken away and the .treadle in normal posit-ion; Fig. 3 is a view similar to Fig. 2, showing the treadle depressed; Fig. l a View similar to Fig. 2, but showing the tripping rod which. was there broken away; Fig. 5 is a longitudinal sectional View lihroie'h the upper end of said tripping rod; *ig. 6 is a front view ofza certain brake as applied to the horizontal friction wheel, portions .of the machine bein broken away 3 and Fig. '7 ise plan riew of t re same,

lltl

- tion-wheel.

fulcrumed as at 20, upon an arm 21 of the bracket 9, so as to swing in a plane through the shaft 7, and which plane is preferably vertical or substantially so. The lever 19 is curved to bring its lower end into substantially horizontal position, and said lower end is connected pivotally to the upper end of aconnecting rod 22. This connecting rod 22 has its lower end pivctally connected, as at t the arm 21 of a lever 25 which is normally horizontal, and which is pivoted upon the frame 1, or front of the bed 6 thereof, as at 26, to swing in a substantially vertical plane. The arm of this lever 25 opposite the arm 24 is provided with a handle 27 by means of which the lever can be swung to slide the drive-disk shaft 7, and so rotate the screw 4 in either direction to move the hammer head 3 up or down. Preferably a weight 28 upon the arm 24 of the lever normally holds said arm 24 depressed, so as to engage the drive-disk 14 with the friction-wheel 5 and elevate the screw, and thus unless the handle 27 is positively forced downward and held there, the sliding head 3 will move upward. To terminate this upward movement, I provide a brake shown in the drawings supported upon the shaft 7, but not revolving with said shaft. Preferably such support is by means of a sleeve loose on the shaft 7 and held against longitudinal sliding thereon by a collar 30 or the like, as best shown in Figs. (3 and 7. A brake shoe 31 of wood or any other suitable material forms the engaging face of the brake, and it will he understood that the brake so placed that as the friction wheel 5 is rotated and mounts upwardly, the upper surface of said wheel 5, preferably adjacentto the periphery thereof, meets and rubs against the said brake shoe 31 and is thereby stopped. Preferably the free swinging end of the brake is connected by a link 32 to the horizontal portion 33 of the lower arm of the le\ er 1!), as shown, so that as the friction wheel presses upward against the brakeas described, the raising of said brake simultaneously raises the said arm portion 33 and swings the lever 19 to disengage the drive disk 14 from the fric- Said link has its lower end threaded and extending loosely through an ear 3 1 projecting from the side of the lever 19, nuts 35, 36. on the threaded rod above and below said ear providing for adjustment as to length of the link.

Obviously, if brake pressure were secured in some other way than by the link 32 which has been described, the lever 19 could be operated by an adjustable dog 37 on the connecting rod 22 adapted to be engaged by a lug 38 on the hammer, and a precaution such a dog is preferably provided in addi tion to the link 32, set so as to operate only if the link for any reason should fail.

A second adjustable dog 39 on the connecting rod 22 is arranged thereupon to be engaged by the projecting lug 38 on the hammer 3 at the end of a downward stroke of said hammer and thus shift the drivedisks 13, 14: through the mechanisms ust described to reverse the direction of rotation of the friction-wheel 5 and carry the hammer up again. In order to cushion the motion given to the connecting rod 22 by impact of the lug 38 with the dog 37 and insure uniform pressure of the drive disk against the friction-wheel 5, a spring 40 is arranged upon the upper end of the connecting rod 22, resting at its lower end upon a fixed collar on said connecting rod and pressing at its upper end against the lever arm 19, said lever arm and connecting rod having a slot-and-pin connection, so that the .rod may have a little upward movement independent of the lever, except as transmitted by the spring.

As so far described, the lllilClllXlGlS operated by lever 25, requiring one hand of the operator to'hold the handle 27 down against gravitation of'the weight 28 and keep the disk 13 in engagement with the wheel 5 to propel the hammer or head 3 downward. In order to leave both of the operators hands free, however, I provide a treadle attachment so arranged that either it or the lever can be used, as desired. To this end I provide beneath the frame 1 a depending bracket 11 to which is pivoted a tripping member 4-2 preferably arranged and adapted to swing in substantially vertical plane, said tripping member having an arm 43 adapted to slidably operate a horizontally disposed dettnt 14i. See Figs. 2 and 3. Said detent id is adapted to enter a notch 45 in a vertically slidable bar 46 to the upper end of which is attached a spring 17 under ten sion, so that when the detent 4:4. is withdrawn from the notch of the bar by swinging of said tripping member 42, the tension of spring 47 will draw said bar 46 upward. A lateral stud 48 on the lever 25'projects transversely through a slot 49 in said bar 4-6, so that the bar will engage said pin and raise the arm 2i of the lever when the bar' 46 is released and drawn upward by said spring 17, and yet because of the slot the lever may be operated without movement of the bar when said bar is down. In order to release the said detent 4L4, the tripping member 42 has a second arm 50, forming with the arm 33 which slides the detent a. bell-crank lever, and to this second arm 50 is connected depending treadle 51 to rc ceive the operators foot. The rod 52 of said treadle has a lower guide bearing in an arm 53 of the bracket -11, and a spring 5% on said rod, between said arm and a fixed collar 55 on the rod, normally holds the treadle elevated and the detent 4st in locking posiand the lower dog- 39 the drive disks 13 foresee tion. lil'ence the machine can be started either by the foot treudle or by the hand lever.

It will be understood that when the machine has been started by means of the treudle 51, so that the Weighted end of the lever 25 is held upward by the bar id and its spring i-i', said weighted end will be depressed against the power of said spring at the termination of ii downstroke, by engagement of the lug 38 on the hammer with the dog; 39 on the connecting rod, thus forcing the bar 46 downward so that it will be locked by the detent 44.

In order to secure automatically continu ous operation of the press, instead of single strokes of the hammer, the trip 'iing member 4-2 has a. third arm 56. preferably projecting opposite to the second arm 50 in alinement therewith as shown, and which third arm is connected to the lever 25 by a link 5?. This link-at its lower end extends loosely through the arm 56 and is threaded to re ceive beneath said arm a nut 58 and lock nut 59 by which the length of the link can be adjusted so that it will be either operative or idle, according as continuous action of the press or a single stroke is desired. The up per end of the said link 57 constitutes an eccentric strap 60 extending; around an cecentric 61 mounted on the outer end of the stud 48 on the lever 25 which projects through the slot d9 of the vertically spring actuated bar 46, said eccentric having-a handle ,(52 and providing meuns for quickly changing the length of the link 57. It, will be understood that when the link 5'? is sufficiently short ue shown in his. l, the raising of the weighted end or erm 524 of the lever 25 upon the return of the hammer to its highest position will phi! upward on the third arm 56 of the tripbiui member 4-2 so as to release the detent 4-4: ant start the hammer upon another stroke.

It is evident that; as the point of contact between the friction wheel 5 and either of and 14 moves farther away from the shaft 7, the speed iui 'ia'rted to the descending hammer is increased and the force of impact or blow struck by the hammer is increased according to the square of the increase in speed. Thus when the lum'nner goes to the lowest possible point of its range of movemrnt permitted by the ma chino, the heaviest blow will be struck, whereas if the work or lower die be raised adjusted so that the luuumer stops at a higher point, the force of impact. or blow of the hammer will be decreased. In this way it is possible in my press to very the blow of the hammer without changing the speed. of the driviiur'pul leys i0, 11, and to this end Iprovidc fillers (73, one of which is shown in Fig. 4, any number of which may be employed to raise the lower die or therein shown. It will be understood that. these fillers 63 are preferably slotted at their edges, as at 65, to 1"- ceivc the bolts 66 which secure the lower die 64 to the bed 6 of the press as is common. 01' if preferred the upper die could be lowcred or brought nearer the bed 6 by inserting in the sliding head an auxiliary socket 6?, of any desired length, as shown iii Fig. 8, a set of these sockets being furnished with each press.

Havingthus described the I claim is- 1. In a. press, a. frame, a screw mounted in said frame, a friction wheel fast on said screw and moving" therewith, drive disks sda 'itcd to engage the edge of said friction .wheel, and a brake located in the path of movement of the friction wheel and adapted to engage said friction wheel upon upward movement. thereof.

2. in :1 press, a frame, a. screw mounted in said frame, a friction wheel fast on said screw and moving there-with, drive disks adapted to engage the edge of said friction wheel, and a yielding; brake located in the path of u'iovemcnt of the friction wheel and adopted to engage said friction wheel upon upward movement of the wheel.

In a press, a frame, a screw mounted in said frame, a friction wheel fast on said screw and moving therewith, drive disks adapted to engage the edge of said friction wheel, a brake adapted to engage said friction Wheel upon upward movement thereof, and means connected to said brake for stopping" the press.

.ln a press, a frame, a screw mounted in said frou'le, a friction wheel fast on said screw and movable therewith, drive disks adapted to engage the wheel, and u swinging brake projecting into the path of movement of the friction wheel and adopted to engage said friction wheel. upon upward inrn'emeut thereof.

In a. press, a frame, a screw mounted in said frau'ie, a friction wheel fast-on said screw and u'iovable therewith, drive disks adapted to engage the edge of said friction I wheel, a swinging: brake projecting into the path of movement of the friction wheel and I adopted to engage said friction wheel upon I invention, whatupwurd movement. thereof, and means c011- ncctod to said swinging broke for stopping the press when the brake is swung.

G. In o press, a frame, a screw mounted in said frame, a friction wheel fast on said screw and moving therewith, drive disks adapted to engage the edge of said friction wheel, a slidable shaft for said drive disks, a brake adapted to engage said friction wheel upon upwu rd movement thereof, and means connected to said broke for sliding" said shaft.

7 Tn a mess, a frame, it screw mounted in edge of said friction a brake adapted tmengage said friction -said friction wheel at opposite points. a

said frame, a friction wheel fast on said screw and moving therewith, drive disks adapted to engage the edge of said friction wheel, a slidable shaft for said drive disks, a lever adapted to slide said shaft, a brake adapted to engage said friction wheel upon up 'ard movement thereof, and means connecting said brake to said lever.

8. In a press, a frame, a screw mounted in said frame, a friction wheel fast on said screw and moving therewith, drive disks adapted to engage the edge of said friction wheel, a slidable shaft for said'drive disks,

wheel uponupward movement thereof, a link connected to said brake, and means adapted to be operated by said link to slide the shaft.

9. In a press, aframc, a screw mounted in said frame, .a friction wheel fast on said screw and moving therewith, drive disksj adapted to engage the edge of said friction wheel, a lever for controlling the transmission of power from said drive disk to 1 said friction wheel, a brake adapted to engage said friction wheel upon upward move ment thereof. and a link connectingsaid brake to said lever.

10. In a press, a frame, a screw mounted in said frame, a friction wheel on said screw, drive disks adapted to engage the edge of Said friction wheel, a slidable shaft for said drive disks, a brake fulcrumed loose on said shaft and adapted to be engaged by the friction wheel upon up nlrd movement thereof, and means connected to said brake for sliding said shaft.

l1. In a press, a frame, a screw mounted in said frame, a friction wheel on said screw. drive disks adapted to engage the edge of said friction wheel, a slidable shaft for said drive. disks, -a lever adapted to slide said shaft, a yieldinglv lllOYIll'tlQ brake adapted to engage the friction wheel upon upward movement thereof, and means connecting} said brake to said lever.

In a. press, a frame, a screw mounted I in said frame, a friction wheel on said screw, drive disks adapted to engage the edge of shaft for said drive disks, a lever adapted to shift said shaft longitudinally, a controlling lever fulcrumed upon said frame 2 t {airbase thereof, a. connecting rod between said levers. a dog on said connecting rod, a lug car-rial by the screw adapted to engage said i deg upon downward movement of the screw, I a. brake above the friction wheel adapted to 1 be engaged and lifted thereby, and means I connecting said brake to said lever for sliding the shaft.

13. A press, a frame, a screw mounted in i 'saidframe, a friction wheel on said screw,

drive disks adapted to engage the edge ofl said friction wheel, a lever for throwing one of said disks into engagement with the friction wheel and the other one out of engagement, afcontrolling lever fulcrumed iipon said frame at the base thereof, a connecting rod between said levers, a dog on said connecting rod, means on the screw for engaging said dog upon downward movement of the screw, a bar adapted to slide up and down in said frame, a releasable detent adapted to hold said bar in lowermost 'position, a spring tending to draw said bar upward, and means for depressing said bar when the controlling lever is depressed and for raising said lever when the detent is released.

14. In a press, a frame,.a screw mounted in said frame, a friction wheel on said screw, drive disks adapted to engage the edge of said friction wheel, a lever for throwingeither of said disks into engage ment with the friction wheel and the other out of engagement, a controlling lever fulcrumed upon said frame at the base thereof, a connecting rod between said levers, means nornally holding said connecting rod raised, a detent for holding said connecting rod depressed, means for releasing said detent, and meanson the connecting rod adapted to be engaged when the screw is lowered to depress the controlling lever.

In a press, a frame, a screw mounted in said frame, a friction wheel on said screw, drive disks adapted to engage said friction wheel, a lever for throwing one of said disks into engagement with the friction wheel and the other one out of engagement, a controlling lever fulcrumed upon said frame at the base thereof, a connecting rod between said levers, a weight adapted to depre said'controlling lever, a vertically slidable bar having a slot adjacent to said lever, a spring for normally holding said bar elevated, a detent for holding said bar depressed, means for releasing said detent, and

Q a stud projecting from the controlling lever into said slotof the bar and adapted to lie at the lower end thereof when the bar and lover are both depressed.

1.6. In a press, a frame, a screw mounted in said frame. a friction wheel on said screw, drive disks adapted to engage said friction wheel, a lever for throwing said disks into and out of engagement, a controlling levcr fulcrumed upon said frame, a conuecti ug rod between said levers, a bar having a SiCll ilIldPllI connection with said lever and' slid-ably mounted in said frame, means for sliding said bar, a detent for said bar, and means for operating said detcnt.

17. In a press, a frame, a screw mounted i in said frame, a friction wheel on said screw,

drive. disks adapted to engage said friction wheel, a lever for throwing said disks into sin m an; Eh:

. Mafiwwm said in and-pin cmmectim'z um. nmuntm: in nun? bar 1!, hippl said (i "ileum and :"a in:

wing n'm'nbmi.

in m prens w '1 fl-w ne 2L id screw, 1 'fx-lcion linim into inn; kaver :2 umncm, :5; rod

null-pin comma 201.2 mi My mountnd in said nenih V 112mm? for L1) bracket, 4mm 1 sari 1 an arm; perpnncikinizu? adapted U on Win]. an: n 1

'vurk :1 scare v mountion Wlmel on said phnes perpendicular an whnel adapted dc presskng the same Wham. the mm '35 10wwad 20, In :1 press; a aft-sunn a SQIBW mmmtnd in said frame, a frictimx wheel on said ow, drive diskg adapized to said v, Grim (1mm, 1 L0 i'fhe 315mm: 01*. We f to m'lgn 'e the on" friction wheel at nppusrtn point. nwans tmr throwing saifl drive 1 into and out of engagement With stint: \vhvc], a 191m 'ior iihrovvitng: said the frictiun wheel, a 'in'u'nn'ml carried by said a into and out ME ang, u0nscrew, and manna for mis'ng and lowering trolling lover fulcrnnmc'i upon l'ihn i Ina n V l ,i won; on sand bed and thus umnwcting rod between said. 19mm, a,- ban' name 01%. the point mi engage hzwing a1, slutzu1.(!.-1 in uonncuiiun ,i when) whc'r-a] with each drive controlling lever nnfi s fidnmy nnurfl'ed in 0'25 said'rh'ive disk at the, .imnm, a. spring nurmzlflv' act of the hammer with bzu upwmwl, a detent- 1'5 ping inmnimfor t-readle means for opm-n, nmnbem mums Conn. sand *5." nwniwbef :linl Um wnirui 5 ever 1: he member thevefiicwn'i. :md .nwnm Lil tin-3f sen;-

EDMUND EEK-1', 

